Process of casting rolls and the like.



F I u 1 WITNESSES H. A. LOMAX.

PROCESS OF CASTING ROLLS AND THE UKE.

Patented 00 's 9, 1917.

3 SHEETSSHEET 1,

APPLICATION HLED AUG-21.1915.

H. A. LOMAX.

PROCESS OF CASTiNG ROLLS AND THE LIKE.

I APPLICATION FILED IEUGZM I915- L fi Patenmd 001191917.

FIE-E- WITNESSES H. A. LOMAXJ PROCESS OF CASTING ROLLS AND THE LIKE.

APPLICATION FILED 'MIG.2I. I916.

1,24Q,2?. Patented 0%. 9,1917.

To all whom it may concern.

HAROLD A. LOMAX, or AsPINvVALL, PENNSYLVANIA.

rzaocnss or oAs'rINe nous AND THELIKE.

Be it known that I, HAROLD A. LQMAX, a

citizen of the United States, residing at Aspinwall, in the county ofAllegheny and State of Pennsylvania, have invented certain new anduseful Improvements in Processes of Casting Rolls and the like, of whichv the followingis a specification.

. My invention consists in an improved method or process of castingrolls for rolling mills andother similar articles. i

In rolls of the type used in reducing metal in rolling mills they areordinarily provided with a main roll body, journal necks, and terminalwabbler connecting portions cast in one piece, and requiringconsiderable finishing treatment to form the wabbler terminals.

In their usual form these terminals are pro vided with a plurality oflaterally extending Wings and intervening recesses for engagement withthe connecting wabblers, and are ordinarily machlned down fromcylindrical -blank casting entailing considerable expense. A commoncause of failure in rolls plus is also due to imperfections in themetal, due to shrinkage and other causes incidental to making the entireroll in one cast.

My invention has in view to, provide means for casting a roll in such amanner as to cast the wabbler terminals and, if desired, portions of thejournal necks, by supplying additional hot metal during or supplementalto the a main casting operation, whereby to supplement the main body,and

compensate for shrinkage andto castjthe wabbler terminal with asinkhead' extension, within suitable casting mechanism, 'inthe mannermore fully hereinafter described.

In the drawings which illustrate differ- .ent forms of mechanism formolding the journal and wabbler portion of one end of the roll, invertical casting thereof,-- Figure I shows portions of a sand moldingflask, together with acastblank and the neck and wabbler forming moldand metal supply, means. 1 v c Fig. 2 is a plan view of Fig. 1,. showingthe mold before casting. v

Figs. 3 and 4, and 5 and 6 respectively ,are corresponding viewsillustrating modifiediconstru'ctions adapted to .carry out theinvention. The roll A,which is usually cast vertically within the sandmold 2 of flask 3 of Specification of Letters Patent.

-- Patented Oct. 9, 1917.

Application filed August 21,1916. Serial No. 115,998.

any suitable construction, is usually formed from upwardly flowing metalsupplied by a lowercon'duit A: leading to a supply e2 rises carriesimpurities and surplus metal to the top, a large proportion of suchsurplus metal being ordinarily utilized at the upper end of the mold toprovide against shrinkage, piping, and other well-known lcontingencies.

The journal portions of the roll 5,5, are molded within the sand mold ofthe flask,

as in ordinary casting operations, as is also thelower wabbler terminal6. The upper wabbler'terminal 6 is, however, cast con-' siderably longerthan the required length, with the wabbler-engaging wings continuous tothe top, as in Fig. 1, whereby to provide at its upper portionadditional metal as required by absorption into the main body of theroll, its upper neck and upper Wabbler, as the roll'g'radually coolsandshrink- .age takes place.

which should ordinarily be thrown sufliciently high to be cutoff aswaste.

; My invention consists in supplementing the main body of metal, afterthe main cast is made, with additional fresh metal from above, and inintroducing such fresh metal into the upper wabbler and neck portion,

whereby. to renew the same,with sufl'icient surplus to carry all impuremetal, and upper waste or surpluskportions to the top, and whereby tosupply and maintain the supplemental. renewing metal at a considerablyhigher temperature than that of the already cast roll,therebymaintaining its fluidity sufliciently long to insure theformation of an absolutely solid homogeneous neck and 'terior of themold. The molten metal as it wabbler section and the maintenance of ahigher degree of heat at such portions of the wabbler at the endof thecast.

I also accomplish the formation of the upper wabbler by such terminalmolding operation in practically finished form, so that it is moldedinto shape corresponding approximately to that of the lower wabbler,

the wabbler extensionsurplus being later removed, asis also the surplussinkhead portion or portions.

For the purpose of thus forming the upper portion of the roll, I providea supplemental molding core 7, preferably in two parts, extending acrossthe upper central portion of the main molding body 2, and

The supplemental metal is poured into these molding cavities from above,either into the central wabbler cavity or the outer cavities, after themain roll has been cast. up

to, say, the level I), b, corresponding'approximately to ,the desiredlengthof the wabbler, or higher. The additional hot I, metal flows intoandjamalgamates with the already cast portion ofthe wabbler and neck,carrying with it upwardly any impurities, to the'top portion andproviding the upper supplemental reservoir supply and eventual wasteportions as to both-the sinkhead and wa bbler elements above, say, theline b, b, as to the wabbler, to anyv necessary extent. r V

In Figs. 3 and 4: the arrangement of the mold'portions, outer.sinkhea'ds, and wabbler extension sinkhead is substantially the same asalready described,except that the pattern for forming the sinkheadcavity should be so constructed as to provide at about the terminal orslightly beyond the end of the wabbler section 6 rounded or concavedterminals of the spaces, between the wabbler wings, ,as indicated at 6",whereby to pro-' vide a cylindrical extension 6? within the core 7 foreaseof flow and ample supply of feed metal, and particularly to avoidcracks or fissures in shrinking, by the prevention of any sharp orrectangular angles.

' The arrangement of the sinkhead,mold cavities of the other parts areas already described. V l

In Figs. 5 and, 6, the general arrangement of the ,roll casting mold issubstantially as already described and identified'by similar numerals,except that the outer sinkhead extensions 9 areeXtended upwardly beyondthe main roll body A of the'same, or slightly less diame'ter,continuously around, forming a neck section considerably larger thannecessary, and adapted to be turned off to pro- ,vide'the upper neck, asindicated by the dotted'line [5. The sand core 7 is formed and locatedin substantially the same way, and the operation as already describedcarried out, the surplus metal being turned away in final treatment ofthe roll for use. It will be understood that various means or modifiedadaptations of the invention as to the particular mechanism for moldingthe parts,controlling the degree of addition of surplus metal, thepercentage of waste, or

variousother featuressor details incident to carrying out the inventionmay be variously changed or modified by the molder or foundry practiceemployed without departure from the scope of the invention.

The advantages of forming a practically finished'wabbler extension andthe resulting reduction inthe cost and. time for cutting away thesurplus metal and the several other advantages of the invention will beunderstood and appreciated by those familiar with the art. I

Having describedv my claim is: 1

1. In the manufacture of rolls oftheclass described, the formation of amain roll body, neck portions and one wabbler portion by invention, whatI 'fiowing molten metal upwardly within a portion and connectingwith theupper neck portion, substantially as and for the purposes described. i Ii 3. In casting. metal bodies, the process of flowing molten metalupwardly within 'a suitable mold to form .a main body, and the additionoffsupplemental metal from, above within a mold while the main body isstill molten forming upper terminal and supply members, the supplementalsupply members connecting with the main body ,a substantial distancebelow the upper terminal, substantially as described. r a u, 4.. In themanufactureof rolls of theclass described, the formation of a main body,neck "portions and the lower wabbler portion by flowing molten metalupwardly within a suitablemain surrounding mold, and adding'moltenmetal, of" a higher temperature, from above within a supplemental moldto form the upper wabbler portion. andjsinkhead portions spaced fromsaid upper wabbler portion'and connecting with said neck portion at thebase of the wabbler portion, substantially for the purpose. described.

5. In the manufacture of rollsof the class described, the formation of a'main bo'dy, neck portions and one wabbler portion-by flowing moltenmetal upwardly Within a In testimony whereof I hereunto afix my suitablesurrounding mold, and adding signature in the presence of two Witnesses.molten metal of a higher temperature, from above Within a supplementalmold to form HAROLD A. LOMAX.

the other wabbler at the upper end and sink- Witnesses:

head portions at the si es of said upper W. A. HEOKMAN, wabbler. C. M.CLARKE.

flopiee of this patent may be obtained for five cents each. byaddressing the Commissioner of Patents,

Washington, I). 0.

